I use the following query to return a list of records
Rating.find(:all, :conditions => ["rating_set = ? and product_id = ?", 1, 2186417])
which returns:
[#<Rating id: 5, label: "Good", rating: 3.0, created_at: "2013-02-20 08:11:36", updated_at: "2013-02-20 08:11:36", recommendation_id: 2186417, notes: "exact match", rating_set: 1, product_id: 2186417>, #<Rating id: 6, label: "Good", rating: 3.0, created_at: "2013-02-20 08:11:36", updated_at: "2013-02-20 08:11:36", recommendation_id: 2054442, notes: "", rating_set: 1, product_id: 2186417>, #<Rating id: 7, label: "Fair", rating: 2.0, created_at: "2013-02-20 08:11:36", updated_at: "2013-02-20 08:11:36", recommendation_id: 2403501, notes: "", rating_set: 1, product_id: 2186417>, #<Rating id: 8, label: "Bad", rating: 3.0, created_at: "2013-02-20 08:11:36", updated_at: "2013-02-20 08:11:36", recommendation_id: 2344645, notes: "", rating_set: 1, product_id: 2186417>]
How can I get a count for each rating label. For example, how many records out of the total are "Good" or how many are "Bad" etc.
You can do that in at least 2 ways.
SQL
klass = Rating.where(rating_set: 1, product_id: 2186417])
good_count = klass.where(label: 'Good').count
bad_count = klass.where(label: 'Bad').count
Array
ratings = Rating.where(rating_set: 1, product_id: 2186417]).all
good_count = ratings.count { |r| r.label == 'Good' }
bad_count = ratings.count { |r| r.label == 'Bad' }
You could try a group by:
Rating.where(:rating_set => 1, :product_id => 2186417).group(:label).count.each{ |k,v| puts "#{k} #{v}" }
Resource: http://guides.rubyonrails.org/active_record_querying.html#group
Related
How to sort collection on parametr n_text?
abc = [108, [#<Advert id: 7095, user_id: 5, n_text: "First text", created_at: "2019-06-03 00:49:00", images_count: 0>, #<Advert id: 7096, user_id: 7, n_text: "Second text", created_at: "2019-06-03 08:23:00", images_count: 1>,...]]
abc.order_by { |k, v| v[:n_text] } dont working.
abc.last.sort_by(&:n_text)
I think this will work, .last because you are going to sort last element of the abc array.
When I create a new admin user, there are three objects of translations:
Admin.last.translations.map(&:locale) # => [:ru, :uz, :uz]
Why are the locales duplicated?
Example:
admin.position_uz = 'CTO'
admin.position_ru = 'CTO'
admin.save!
admin.translations.count = 3
admin.translations.first.position = 'CTO'
admin.translations.second.position = 'Another value or empty'
admin.translations.third.position = 'CTO'
Every time the locale is set to uz, it shows the second variant.
Admin translations loo like
[
#<Admin::Translation id: 1, admin_id: 2, locale: "ru", position: "CTO", created_at: "2019-01-16 06:24:17", updated_at: "2019-01-16 06:30:31">,
#<Admin::Translation id: 2, admin_id: 2, locale: "uz", position: "Board Member", created_at: "2015-07-26 20:42:18", updated_at: "2015-07-26 20:42:18">,
#<Admin::Translation id: 3, admin_id: 2, locale: "uz", position: "CS manager", created_at: "2019-01-16 06:24:17", updated_at: "2019-01-16 07:09:21">
]
I have a collection of user.paid_subscriptions in which each subscription has attributes created_at(datetime) and active(boolean).
How can I check if a PaidSubscription exists such that created_at is not equal to a certain date and active is true?
PaidSubscription looks like this:
[
#<PaidSubscription id: 11457,
user_id: 12,
period: 3,
price: 4000,
expires_at: "2016-03-08 09:44:56",
expires_at: "2016-03-08 09:44:56",
created_at: "2015-12-08 09:44:56",
updated_at: "2016-03-08 23:00:09",
active: false,
giver_id: 20573,
partial: false,
remaining_days: 0>,
#<PaidSubscription id: 13948,
user_id: 12,
period: 1,
price: 1500,
expires_at: "2016-04-11 12:07:40",
created_at: "2016-03-11 13:07:40",
updated_at: "2016-04-11 22:00:11",
active: false,
giver_id: nil,
partial: false,
remaining_days: 0>,
#<PaidSubscription id: 11458....
]
Try this,
If it is a query then it should be like this
user.paid_subscriptions.where("created_at < :date or created_at > :date and active = :active",{date: DateTime.civil(yyyy,mm,dd), active: true})
Or
if it is an array you can use it like below.
user.paid_subscriptions.any? {|ps| ps.active && ( ps.created_at.to_date < Date.civil(yyyy, mm, dd) || ps.created_at.to_date > Date.civil(yyyy, mm, dd))}
When I call:
preivous_lessons = #item.where("track_id = ?", lesson.track_id)
I get this active record realtion:
[#<CodeLesson id: 2, name: "Python", permalink: "python", lesson_content: "", instructions: "Print your name to the console.", hints: "", starting_code: "\"\"\"\r\nThis is a comment\r\n\"\"\"\r\n\r\nprint(\"Hello, World\"...", language_id: "12", order: 1, track_id: 2, user_id: 1, created_at: "2014-02-14 16:01:12", updated_at: "2014-02-15 21:14:43", visible: true>, #<CodeLesson id: 8, name: "Test Lesson", permalink: "test-lesson", lesson_content: nil, instructions: nil, hints: nil, starting_code: nil, language_id: "26", order: nil, track_id: 2, user_id: 1, created_at: "2014-02-20 19:23:15", updated_at: "2014-02-20 19:23:15", visible: false>]
How do I convert this into a usable array of models so I can do something like this:
preivous_lessons.each do |i|
highest = i.order if i.order > highest
end
As OP confirmed from my comment, that my hint solved his problem, I am putting it as an answer to the post :
preivous_lessons = #item.where("track_id = ?", lesson.track_id)
highest = preivous_lessons.maximum(:order)
Documentation of maximum :
Calculates the maximum value on a given column. The value is returned with the same data type of the column, or nil if there's no row.
preivous_lessons = #item.where("track_id = ?", lesson.track_id).all
I am doing something obviously wrong here, but I don't get it.
I have a partial call like so:
= render 'shared/purchase', collection: #purchases
#purchases is defined in the controller like so:
#purchases = current_user.purchases
But I get this error:
app/views/shared/_purchase.html.slim where line #3 raised:
undefined local variable or method `purchase' for #<<Class:0x007fd8ca54f970>:0x007fd8ca54eb60>
However, when I change the partial to just render the local_assigns I see this:
[:collection, #<ActiveRecord::Associations::CollectionProxy [#<Purchase id: 40, user_id: 20, purchaseable_id: 6, purchaseable_type: "PurchaseType", frequency: "Weekly", day: "Su", notes: "leave at gate", allergies: "peanuts", created_at: "2013-07-24 16:58:08", updated_at: "2013-07-24 16:58:08", size: "Normal", quantity: 2>, #<Purchase id: 41, user_id: 20, purchaseable_id: 5, purchaseable_type: "PurchaseType", frequency: "Weekly", day: "Su", notes: "leave at gate", allergies: "peanuts", created_at: "2013-07-24 16:58:08", updated_at: "2013-07-24 16:58:08", size: "Jumbo", quantity: 3>, #<Purchase id: 42, user_id: 20, purchaseable_id: 7, purchaseable_type: "PurchaseType", frequency: "Weekly", day: "Su", notes: "leave at gate", allergies: "peanuts", created_at: "2013-07-24 16:58:08", updated_at: "2013-07-24 16:58:08", size: nil, quantity: 1>, #<Purchase id: 43, user_id: 20, purchaseable_id: 8, purchaseable_type: "PurchaseType", frequency: "Weekly", day: "Su", notes: "leave at gate", allergies: "peanuts", created_at: "2013-07-24 16:58:08", updated_at: "2013-07-24 16:58:08", size: nil, quantity: 1>]>]
[:purchase, nil]
Why isn't each collection item getting picked up as the local variable purchase?
I'm tearing my hair out, I'm sure it's something stupid, I've done this many times before, and even compared old working code to this and I can't figure out what the problem is. Either it's a new Rails 4 thing that I'm not seeing in the docs, or I'm an idiot.
Thanks!
The Rails documentation on Layouts and Render in Rails gives an example using the partial parameter for render:
<h1>Products</h1>
<%= render partial: "product", collection: #products %>